It's funny, but I think the article is showing it's age. It's no longer true.
In hindsight having automated auto complete rewriting your code base wasn't something on 2000's radar.
Now switching from language to language is much easier. Just for Rust, there was Ladybird and Bun complete rewrite, that ran into zero things that Joel rallied about.
I think it was always hyperbolic to call rewrites the single greatest mistake (I can think of worse) but I think most of the wisdom still holds. And AI generated rewrites are arguably riskier because now NOBODY is familiar with the massive codebase.